GB674326A - Improvements in or relating to electronic counters - Google Patents
Improvements in or relating to electronic countersInfo
- Publication number
- GB674326A GB674326A GB10170/49A GB1017049A GB674326A GB 674326 A GB674326 A GB 674326A GB 10170/49 A GB10170/49 A GB 10170/49A GB 1017049 A GB1017049 A GB 1017049A GB 674326 A GB674326 A GB 674326A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- pulse
- over
- valve
- counter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/491—Computations with decimal numbers radix 12 or 20.
- G06F7/498—Computations with decimal numbers radix 12 or 20. using counter-type accumulators
- G06F7/4981—Adding; Subtracting
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
- H03K23/82—Pulse counters comprising counting chains; Frequency dividers comprising counting chains using gas-filled tubes
Landscapes
- Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- X-Ray Techniques (AREA)
- Electronic Switches (AREA)
Abstract
674,326. Digital electric calculating-apparatus. BRITISH TABULATING MACHINE CO., Ltd., and CARTWRIGHT, J. R. April 12, 1950 [April 14, 1949], No. 10170/49. Class 106 (i). In an electronic counter comprising one or more denominations, adapted to have numbers entered therein in the same form irrespective of sign, means responsive to an indication that a number to be entered is of opposite sign to that last entered convert the value registered by the counter to the complementary value. Operation. Fig. 3 shows a counter, forming one denomination E of the accumulator illustrated in Fig. 4, and comprising four series - connected trigger stages A, B, C, D and a locking valve L which count in the decimal scale as described in Specification 609,502. Isolating valves T1, T2, T3 separate the stages and the carry pulse, emitted for every tenth input pulse on line 15, is sent through a gate valve C. Inversion of the value in the counter is effected in four steps: (1) a negative potential on line 24 renders valve L ineffective so that the counter capacity is increased to 16; (2) three positive pulses on line 25 are applied to valve T1, thus entering the value 6; (3) a negative potential on line 26 renders valves T1, T2, T3 and C ineffective thus isolating the triggers; (4) a negative inverting pulse on line 27 applied to the suppressor grids of all the trigger valves switches over the triggers to register the complementary value; the potential on lines 24, 26 is then returned to normal. This inversion is initiated by a negative pulse on "subtract" line 1, Fig. 4, which switches over two " flip-flop " circuits which remain in their unstable state for the whole inversion cycle. One circuit controls a multivibrator so that it emits pulses alternately over lines 5 and 9. The other lowers the potential on line 2 (24, Fig. 3) and applies a pulse over line 3 to switch over a " 6 Add" flip-flop which remains in its unstable state for sufficient time to allow three pulses on line 5 to pass through a gate valve, controlled over line 4, to the valves T1 of the denominations E1-E5, and, when it returns to normal, applies a pulse over line 7 to switch over an " Invert Lock" flip-flop which then lowers the potential on line 8 (26, Fig. 3), and remains " on for a sufficient time to allow one inverting pulse from line 9 to pass through a gate valve controlled over line 11. Each pulse on line 1 also switches over a " True Sense " trigger stage which thus registers whether the number of inversions is even or odd. The sign is registered by a "Sign Sense" trigger which is switched over whenever a " fugitive one " pulse is sent over line 12 from the highest to the lowest denomination. Entering and reading out values. Values may be entered in the accumulator from punched record cards. When a hole is sensed in a particular card column a differentially timed positive impulse is sent over line 165, Fig. 6, and switches over a trigger circuit 137, 138, thus raising the control grid potential of a valve 139. The brush of a commutator 148 is driven in synchronism with the card-sensing mechanism to supply pulses to the valve suppressor grid so that if, e.g. a " 6 " hole is sensed, pulses from segments 147 (6) to (1) will produce negative pulses at the anode on line 154 which is connected to the input line 15, Fig. 3, of a counter. The trigger 137, 138 is subsequently reset by a pulse on line 152 To read out from the counter, the trigger is first switched over by a positive pulse on line 156. Thus the commutator will produce pulses on line 154 which are added in the counter until a carry pulse is produced on line 149 connected to the anode of valve D1 (line not shown in Fig. 3). This pulse will switch over trigger 140, 141, thus raising the grid potential of a valve 142 so that it conducts and energizes a relay 155 which closes contacts (not shown) e.g. to operate a punch magnet. During the read-out operation, carry valve C, Fig. 3, is rendered inoperative but valves T1, T2, T3 are not affected, the counter circuit being modified accordingly. Other modifications. The counter, Fig. 3, may be modified to count in the duo-decimal scale by altering the connection between the triggers and to the lock valve L and adding " 4 " instead of " 6 " during inversion. The lock valve may be omitted and a decimal or duo-decimal count obtained by making an initial entry of " 4 " or " 6," this entry also being made when a carry occurs. A modified pulse emitter and associated inversion-control circuits are described, Fig. 5A (not shown), comprising series-connected trigger stages which are successively switched " on " by the preceding stage and switched " off " by pulses from a multivibrator.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL717110557A NL152914B (en) | 1949-04-14 | REACTOR FOR PREPARING SOOT. | |
NL81653D NL81653C (en) | 1949-04-14 | ||
GB10170/49A GB674326A (en) | 1949-04-14 | 1949-04-14 | Improvements in or relating to electronic counters |
US150991A US2703202A (en) | 1949-04-14 | 1950-03-21 | Electronic binary algebraic accumulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB10170/49A GB674326A (en) | 1949-04-14 | 1949-04-14 | Improvements in or relating to electronic counters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB674326A true GB674326A (en) | 1952-06-25 |
Family
ID=9962827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10170/49A Expired GB674326A (en) | 1949-04-14 | 1949-04-14 | Improvements in or relating to electronic counters |
Country Status (3)
Country | Link |
---|---|
US (1) | US2703202A (en) |
GB (1) | GB674326A (en) |
NL (2) | NL152914B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2813676A (en) * | 1953-04-16 | 1957-11-19 | Ibm | Self-complementing electronic counter |
US2829830A (en) * | 1952-08-29 | 1958-04-08 | Ibm | Self complementing accumulating machine |
US2892587A (en) * | 1953-09-03 | 1959-06-30 | Hughes Aircraft Co | Result-from-carry adder-subtracters |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800276A (en) * | 1950-12-21 | 1957-07-23 | Ibm | Electronic conversion counter |
US2780408A (en) * | 1951-06-22 | 1957-02-05 | Sperry Rand Corp | Electronic accumulator |
US2928601A (en) * | 1952-03-25 | 1960-03-15 | Hughes Aircraft Co | Arithmetic units for decimal coded binary computers |
US2924381A (en) * | 1952-04-22 | 1960-02-09 | Ncr Co | Digital differential analyzer |
US2886241A (en) * | 1952-08-26 | 1959-05-12 | Rca Corp | Code converter |
US2853235A (en) * | 1952-11-20 | 1958-09-23 | Applied Science Corp Of Prince | Binary digit multiplier circuit |
US2823855A (en) * | 1952-11-26 | 1958-02-18 | Hughes Aircraft Co | Serial arithmetic units for binary-coded decimal computers |
US2954926A (en) * | 1953-01-13 | 1960-10-04 | Sperry Rand Corp | Electronic data processing system |
NL185260B (en) * | 1953-02-20 | Kaysersberg Sa | S-SHAPED FOLDED, PARTICULARLY USABLE FOR DIAPER PANTS, ADHESIVE STRIP. | |
NL188198C (en) * | 1953-06-09 | Sony Corp | TELEVISION RECEIVER WITH HIGH VOLTAGE PROTECTION. | |
US2933251A (en) * | 1953-10-16 | 1960-04-19 | Ibm | Record controlled machine |
US2924383A (en) * | 1953-12-11 | 1960-02-09 | Weiss Eric | Circuitry for multiplication and division |
US3245039A (en) * | 1954-03-22 | 1966-04-05 | Ibm | Electronic data processing machine |
US2997233A (en) * | 1954-06-28 | 1961-08-22 | Burroughs Corp | Combined shift register and counter circuit |
NL199007A (en) * | 1954-07-19 | |||
BE542991A (en) * | 1954-11-22 | |||
US2995298A (en) * | 1954-12-27 | 1961-08-08 | Curtiss Wright Corp | Arithmetic device |
FR1116672A (en) * | 1954-12-30 | 1956-05-09 | Ibm France | Relay counter |
US3131295A (en) * | 1955-04-20 | 1964-04-28 | Research Corp | Counter circuit |
US2848166A (en) * | 1955-11-03 | 1958-08-19 | Ibm | Counter |
US2823856A (en) * | 1956-03-23 | 1958-02-18 | Rca Corp | Reversible counter |
US3062443A (en) * | 1956-12-04 | 1962-11-06 | Borg Warner | Indicating system |
US2969912A (en) * | 1957-02-26 | 1961-01-31 | Ibm | Error detecting and correcting circuits |
FR1538083A (en) * | 1966-09-28 | 1968-08-30 | Ibm | Arithmetic device |
GB0024278D0 (en) * | 2000-10-04 | 2000-11-15 | Bsw Ltd | A device for gripping a pipe or bar |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE480690A (en) * | 1941-07-21 | |||
US2364540A (en) * | 1942-10-10 | 1944-12-05 | Ibm | Calculating machine |
US2462275A (en) * | 1942-11-02 | 1949-02-22 | Rca Corp | Electronic computer |
US2422698A (en) * | 1942-11-05 | 1947-06-24 | Bell Telephone Labor Inc | Time measuring system |
US2386481A (en) * | 1942-12-21 | 1945-10-09 | Ibm | Calculating machine for effecting division |
NL83274C (en) * | 1944-12-27 | |||
US2489325A (en) * | 1946-10-25 | 1949-11-29 | Int Standard Electric Corp | Electrical storage of information |
US2502360A (en) * | 1947-03-14 | 1950-03-28 | Bell Telephone Labor Inc | Electronic computer |
US2500294A (en) * | 1947-08-13 | 1950-03-14 | Ibm | Descending counter |
-
0
- NL NL81653D patent/NL81653C/xx active
- NL NL717110557A patent/NL152914B/en unknown
-
1949
- 1949-04-14 GB GB10170/49A patent/GB674326A/en not_active Expired
-
1950
- 1950-03-21 US US150991A patent/US2703202A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2829830A (en) * | 1952-08-29 | 1958-04-08 | Ibm | Self complementing accumulating machine |
US2813676A (en) * | 1953-04-16 | 1957-11-19 | Ibm | Self-complementing electronic counter |
US2892587A (en) * | 1953-09-03 | 1959-06-30 | Hughes Aircraft Co | Result-from-carry adder-subtracters |
Also Published As
Publication number | Publication date |
---|---|
US2703202A (en) | 1955-03-01 |
NL152914B (en) | |
NL81653C (en) |
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